Knowing the magnitude of the short circuit current is essential to ensure fire safety. It is obvious that if the measured short-circuit current is less than the setting current of the maximum protection of the machine or 4 times the fuse current rating, then the response time (fuse blowout) will be longer, and this, in turn, can lead to excessive heating of the wires and their a fire.

How to determine this current? There are special techniques and special instruments for this. Here we consider the question of how to do this, having only a multimeter or even a voltmeter. Obviously, this method has not very high accuracy, but still sufficient to detect a mismatch between the overcurrent protection and the value of this current. How to do it at home? It is necessary to take a sufficiently powerful receiver, for example, an electric kettle or an iron. It would be nice to have a tee ...

In practice, there are many ways to connect electrical outlets with wiring. During their implementation, different goals can be pursued, from austerity of materials and means to reliable, long-term and safe operation of the equipment.

Given the increasing needs of the population for the use of powerful electrical appliances in everyday life, we should dwell on the most favorable electrical circuit for a home network that provides maximum safety during operation. It should be divided into two components of the system: the power unit, which provides electricity to household appliances through outlets, the lighting system, separated from the operation of the power unit. To create the power circuits of the internal apartment panel, circuit breakers are mounted according to the number of necessary connections. A cable is laid from each machine ...

A very convenient tool for metering consumed electricity in everyday life is the household wattmeter, which is widely used recently in the market of measuring instruments. This device serves as a portable meter for energy consumption and associated material costs.

This is very convenient for planning energy costs, as well as for optimizing some household consumers. The device is a digital device that looks like an adapter or adapter, equipped with an indicator display and several control buttons.

The device measures and displays on the display the consumption parameters of household electrical appliances connected through it to the household electrical network. These parameters are: mains voltage, current drawn by the load, power factor of the load ...

Every year, LEDs are finding wider application, and can be used in many areas of lighting technology, including lighting of housing and communal services and emergency lighting systems. LEDs are indispensable in all kinds of design projects, including the design of architectural structures, decorative lighting of cars and much more.

All this is made possible by their clean light, economy and safety. LED luminaires are installed in porches, underpasses, elevators - wherever minimal maintenance and energy saving are required with the proper quality and reliability of lighting equipment.

The power of LEDs increases all the time, their luminous flux increases, and it is not at all surprising that these components are also in SMD design now no less, but in recent years - more and more popular...

It’s no secret to anyone that batteries are firmly embedded in the everyday life of modern people. These are the power sources of our cell phones, digital cameras, camcorders, tablets and laptops - you can list endlessly. As for precision medical devices, portable devices, this is the most serious situation, because human life can be at stake.

Despite the achievements of the battery industry, such as lithium batteries of any shape and any desired size, progress in this area does not stand still, and now the next innovation is the flexible battery.

This is an elastic polymer battery. If with a liquefied electrolyte there could be problems related to safety due to the destruction of the release film during heating during operation, then in the case of a polymer, the stability of materials ...

According to the new rules in force, all luminaires must be connected with three electric wires. In cases where the apartment is being repaired and the wiring is done according to a two-wire circuit, modernization and transition to a three-wire power supply system with a PE conductor should be carried out. But if the place for connecting it is not prepared on the floor board, then the ends of the protective zero with the yellow-green marking of the insulation are left ready for connection, but they do not commute.

Luminaire connection diagram via a single-button switch. The contact of the switch is connected from phase L. The second end of the cable core is output through the additional terminal of the DC in the junction box on the cartridge to the lighting lamp. The connection of the cartridge must be carried out so that when replacing a burned-out bulb when the switch is on, a person does not fall under the phase potential ...

Drawing means the process of creating images of objects with the exact reproduction of their sizes using scale. Drawing electrical circuits requires compliance with GOST symbols adopted to denote each element.

To create a document on a computer, you need software - a graphical editor that converts the manipulation of a PC user on the information input device into a drawing. The created document can be saved electronically by a file and / or printed on paper in a specific format.

You can draw electrical circuits with any available graphic editor. However, special programs adapted for these purposes greatly simplify routine work and allow the use of already prepared blanks of various elements ...

Thermostats (thermostats) for "warm floors" are necessary, first of all, as a means of ensuring the most optimal and most accurate control of the "warm floor" heating system. The most comfortable floor heating of the house, optimal energy consumption, and simply convenient automated climate control of the room - these are the main tasks that the room thermostat solves.

In the process, the thermostat receives data on the temperature in the room (or floor temperature) from the temperature sensor, and, in accordance with the data received, switches the heating system on or off.

There are programmable and non-programmable thermostats. A non-programmable thermostat ensures that the room temperature is maintained at a strictly set level ...